EP2559871A1 - Procédé de commande de combustion/augmentation de température et dispositif pour système de brûleur de post-traitement - Google Patents

Procédé de commande de combustion/augmentation de température et dispositif pour système de brûleur de post-traitement Download PDF

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Publication number
EP2559871A1
EP2559871A1 EP11768578A EP11768578A EP2559871A1 EP 2559871 A1 EP2559871 A1 EP 2559871A1 EP 11768578 A EP11768578 A EP 11768578A EP 11768578 A EP11768578 A EP 11768578A EP 2559871 A1 EP2559871 A1 EP 2559871A1
Authority
EP
European Patent Office
Prior art keywords
temperature
burner
exhaust gas
gas purification
particulate filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11768578A
Other languages
German (de)
English (en)
Inventor
Toshikatsu Muramatsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hino Motors Ltd
Original Assignee
Hino Motors Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hino Motors Ltd filed Critical Hino Motors Ltd
Publication of EP2559871A1 publication Critical patent/EP2559871A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4263—Means for active heating or cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F01N3/0256—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases the fuel being ignited by electrical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to a combustion/temperature increase control method and device for an after-treatment burner system.
  • a particulate filter is incorporated in an exhaust pipe for flow of an exhaust gas to capture particulates (particulate matters) in the exhaust gas.
  • the exhaust gas from the diesel engine in a normal operation status rarely has a chance to obtain a temperature level at which the particulates combust by themselves.
  • an oxidation catalyst having active species such as Pt and Pd is integrally carried by the particulate filter.
  • fuel (HC) added upstream of the particulate filter undergoes the oxidation reaction during its passage through the frontward oxidation catalyst.
  • the exhaust gas heated by heat of the reaction and flowing into the particulate filter just behind increases a catalyst bed temperature of the particulate filter to burn off the particulates, thereby regenerating the particulate filter.
  • the frontward oxidation catalyst hardly has an elevated catalyst bed temperature enough for sufficient catalytic activity and thus an activated oxidation reaction of the added fuel in the oxidation catalyst, failing in effective regeneration of the particulate filter within a short time.
  • Patent Literatures 1 and 2 as prior art document information relating to this kind of technique on exhaust gas purification catalyst or heating of exhaust gas by use of a burner.
  • a temperature increase rate at which a temperature of a particulate filter is increased from ignition of a burner to a target temperature.
  • To enhance the temperature increase rate for quick reaching of the temperature of the particulate filter to the target temperature may cause, as plotted in Fig. 2 , overshoot in temperature of the particulate filter near the target temperature into an excessive heating state over the target temperature, resulting in abnormal combustion of the particulates accumulated in the particulate filter.
  • the invention was made in view of the above and has its object to prevent an exhaust gas purification member such as a particulate filter from being excessively heated over a target temperature while minimizing a temperature increase or heat-up time.
  • the invention is directed to a combustion/temperature increase control method for an after-treatment burner system with a burner arranged upstream of an exhaust gas purification member incorporated in an exhaust pipe to increase a temperature of the exhaust gas purification member by combustion with the burner, characterized in that, for temperature increase of the exhaust gas purification member to a target temperature through ignition of the burner, fuel injection control of the burner is performed such that a temperature increase rate of the exhaust gas purification member is kept relatively high until the temperature of the member approaches the target temperature and is lowered stepwise after the temperature thereof approaches the target temperature.
  • the fuel injection control of the burner performed to keep relatively high the temperature increase rate of the exhaust gas purification member till the approaching of the temperature of the member to the target temperature contributes to substantial shortening of a temperature increase time at least initially after the ignition of the burner.
  • the fuel injection control of the burner performed to lower stepwise the temperature increase rate after the approaching to the target temperature contributes to keeping the temperature of the exhaust gas purification member at the target temperature with no overshoot.
  • the invention is also directed to a combustion/temperature increase control device for an after-treatment burner system with a burner arranged upstream of an exhaust gas purification member incorporated in an exhaust pipe to increase a temperature of the exhaust gas purification member by combustion with the burner, characterized in that it comprises temperature detecting means for detecting the temperature of the exhaust gas purification member and a control device body for monitoring the temperature of the exhaust gas purification member on the basis of a detection signal from the temperature detecting means to increase the temperature of the exhaust gas purification member to a target temperature through ignition of the burner as needed and that it is configured to perform fuel injection control for the burner such that a temperature increase rate of the exhaust gas purification member is kept relatively high until the temperature of the member approaches the target temperature and is lowered stepwise after the temperature thereof approaches the target temperature.
  • the fuel injection control of a burner performed to keep relatively high the temperature increase rate of the exhaust gas purification member till the approaching of the temperature of the member to the target temperature contributes to substantial shortening of a temperature rising time at least initially after the ignition of the burner.
  • the fuel injection control of the burner performed to lower stepwise the temperature increase rate after the approaching to the target temperature contributes to keeping the temperature of the exhaust gas purification member at the target temperature with no overshoot.
  • FIG. 3 shows the embodiment of the invention.
  • reference numeral 1 denotes a diesel engine with a turbocharger 2.
  • Intake air 4 from an air cleaner 3 is sent through an intake pipe 5 to a compressor 2a of the turbocharger 2.
  • the intake air 4 pressured with the compressor 2a is sent to an intercooler 6 where the air is cooled and is further guided to an intake manifold 7 where the air is distributed to each of cylinders 8 of the diesel engine (an in-line six-cylinder engine is illustrated in Fig. 3 ).
  • An exhaust gas 9 discharged from each of the cylinders 8 of the diesel engine 1 is sent through an exhaust manifold 10 to a turbine 2b of the turbocharger 2.
  • the exhaust gas having driven the turbine 2b is sent to an exhaust pipe 11.
  • a particulate filter 12 (an exhaust gas purification member) which integrally carries an oxidation catalyst and which is encased by a muffler 13.
  • a burner 14 Arranged in front of the particulate filter 12 is a burner 14 which injects a proper amount of fuel and ignites and combusts the fuel. Though it is not shown, the burner 14 includes a fuel injection nozzle for injection of a proper amount of fuel and an ignition plug for ignition of the fuel injected through an injection port of the nozzle.
  • a combustion air supply pipe 15 Connected to the burner 14 is a combustion air supply pipe 15 which is branched downstream from the compressor 2a of the turbocharger 2 such that a part of the intake air 4 supercharged by the compressor 2a is extracted and guided as combustion air.
  • the muffler 13 is equipped with a temperature sensor 16 (temperature detecting means) which detects a temperature of the particulate filter 12.
  • the temperature of the particulate filter 12 detected by the sensor 16 is input to a control device body 17 as a detection signal 16a.
  • an alternative detection mode may be also applied in which a temperature of a nearest position on an entry side of the particulate filter 12 or both entry- and exit-side exhaust gas temperatures of the particulate filter 12 are detected to estimate the temperature of the particulate filter 12.
  • the temperature of the particulate filter 12 is monitored on the basis of the detection signal 16a from the temperature sensor 16 and, as needed, a control signal 14a is transmitted to ignite the burner 14 to heat the particulate filter 12 to a target temperature.
  • a fundamental generated amount of particulates is estimated. The estimated fundamental generated amount is multiplied by modification coefficient determined in consideration of various conditions relating to generation of the particulates, and an amount of the treated particulates in the current operation status is subtracted from this to obtain a final generated amount, such final generated amounts being momentarily cumulated to estimate an accumulated amount of the particulates.
  • the accumulated amount of such particulates may be estimated on the basis of a difference in pressure upstream and downstream of the particulate filter 12 or estimated by using an operating time or a travel distance as an indicator.
  • the control signal 14a is output to ignite the burner 14 so that the particulate filter 12 is heated to the target temperature.
  • fuel injection of the burner 14 is controlled such that a temperature increase rate of the particulate filter 12 is kept at relatively high until the temperature approaches the target temperature and is lowered stepwise after approaching the target temperature.
  • a fuel injection amount of the burner 14 is controlled to be narrowed such that the temperature increase rate of the particulate filter 12 is lowered after the temperature of the particulate filter 12 approaches the target temperature.
  • the temperature increase rate may be controlled in three or more steps.
  • the fuel injection control of the burner 14 performed to keep relatively high the temperature increase rate of the particulate filter 12 till the approaching of the temperature of the particulate filter to the target temperature contributes to substantial shortening of a temperature increase time at least initially after the ignition of the burner 14.
  • the fuel injection control of the burner 14 performed to lower stepwise the temperature increase rate after the approaching to the target temperature contributes to keeping the temperature of the particulate filter 12 at the target temperature with no overshoot.
  • the particulate filter 12 can be prevented from being excessively heated over the target temperature to avoid a risk of abnormal combustion of particulates accumulated on the particulate filter 12 while minimizing the temperature increase time from ignition of the burner to the attainment of the temperature of the particulate filter 12 to the target temperature.
  • the combustion/temperature increase control method and device for an after-treatment burner system according to the invention are not limited to the embodiment described above.
  • the exhaust gas purification member is a particulate filter
  • the after-treatment burner system according to the invention may also be applied to cases using various exhaust gas purification catalysts as exhaust gas purification members;
  • the exhaust gas purification catalyst may be a selective reduction catalyst having a characteristic of selectively reacting NO x with a reducing agent even in the presence of oxygen or a NO x -occluded reduction catalyst having a characteristic of oxidizing NO x in an exhaust gas when an air/fuel ratio of the exhaust gas is lean to temporarily occlude NO x in the form of nitrate and dissolving and discharging NO x through the intervention of unburned HC, CO or the like to perform a reductional purification when an O 2 concentration in the exhaust gas is decreased.
  • the invention may be also similarly applied to an after-treatment burner system using a burner to increase the temperature of such exhaust gas purification catalyst in a cooling state to an activation temperature range.
  • the exhaust gas purification catalyst can be prevented from being excessively heated over a target temperature; thus, heat deterioration or the like of the exhaust gas purification catalyst can be avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
EP11768578A 2010-04-12 2011-03-11 Procédé de commande de combustion/augmentation de température et dispositif pour système de brûleur de post-traitement Withdrawn EP2559871A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010091190A JP2011220252A (ja) 2010-04-12 2010-04-12 後処理バーナシステムの燃焼昇温制御方法及び装置
PCT/JP2011/001435 WO2011129051A1 (fr) 2010-04-12 2011-03-11 Procédé de commande de combustion/augmentation de température et dispositif pour système de brûleur de post-traitement

Publications (1)

Publication Number Publication Date
EP2559871A1 true EP2559871A1 (fr) 2013-02-20

Family

ID=44798441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11768578A Withdrawn EP2559871A1 (fr) 2010-04-12 2011-03-11 Procédé de commande de combustion/augmentation de température et dispositif pour système de brûleur de post-traitement

Country Status (5)

Country Link
US (1) US20130008150A1 (fr)
EP (1) EP2559871A1 (fr)
JP (1) JP2011220252A (fr)
CN (1) CN102822461A (fr)
WO (1) WO2011129051A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7980061B2 (en) * 2008-03-04 2011-07-19 Tenneco Automotive Operating Company Inc. Charged air bypass for aftertreatment combustion air supply

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59147814A (ja) * 1983-02-15 1984-08-24 Nissan Motor Co Ltd 内燃機関における排気微粒子捕集用トラツプの再生用バ−ナ−の制御装置
JPH0345411U (fr) * 1989-09-12 1991-04-26
JPH04191411A (ja) * 1990-11-22 1992-07-09 Japan Electron Control Syst Co Ltd エンジンの排気浄化用触媒装置
JPH0586845A (ja) * 1991-09-30 1993-04-06 Toyota Motor Corp 内燃機関の排気浄化装置
US5339630A (en) 1992-08-28 1994-08-23 General Motors Corporation Exhaust burner catalyst preheater
JP4103813B2 (ja) * 2004-02-02 2008-06-18 トヨタ自動車株式会社 内燃機関の排気浄化装置
EP1948914B1 (fr) * 2005-10-28 2011-12-28 Corning Incorporated Regeneration de filtres a particules diesel
US7677028B2 (en) * 2006-02-28 2010-03-16 Caterpillar Inc. Particulate trap regeneration temperature control system
EP1873369B1 (fr) * 2006-06-28 2010-08-11 C.R.F. Società Consortile per Azioni Régénération d'un filtre à particules diesel
US20080104948A1 (en) * 2006-10-31 2008-05-08 David Joseph Kapparos Method of regenerating a particulate filter
US7980065B2 (en) * 2007-07-19 2011-07-19 Corning Incorporated Regeneration method for ceramic honeycomb structures
JP5047903B2 (ja) * 2008-08-11 2012-10-10 日野自動車株式会社 排気浄化装置の制御方法
JP5614004B2 (ja) * 2009-07-31 2014-10-29 いすゞ自動車株式会社 触媒昇温装置
US8407989B2 (en) * 2010-04-06 2013-04-02 Caterpillar Inc. Regeneration strategy for engine exhaust

Non-Patent Citations (1)

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Title
See references of WO2011129051A1 *

Also Published As

Publication number Publication date
US20130008150A1 (en) 2013-01-10
WO2011129051A1 (fr) 2011-10-20
JP2011220252A (ja) 2011-11-04
CN102822461A (zh) 2012-12-12

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